Objectives To explore the contamination of Legionella in the hot water of shower system in Xicheng district of Beijing.
Methods One hundred and thirty hot water samples were collected by random. Legionellae was isolated and identified from all samples. Polymerase chain reaction (PCR) was used for the confirmation of suspected strains.
Results Twenty eight samples were Lp positive in 130 hot water samples with a positive rate of 21.5%. The Lp positive rate from July to November was different statistically. Serotypes were mainly type LP1 and LP7.
Conclusions Legionella contamination was very serious in hot water system, management and monitoring should be strengthened. Necessary measures should be taken promptly to protect public health.
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